llvm/lib/Support
2011-01-05 16:38:57 +00:00
..
Unix Support/PathV2: Implement directory iteration on POSIX. 2011-01-05 16:38:57 +00:00
Windows Missed some StringRefRefs. 2010-12-17 18:59:09 +00:00
Allocator.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
APFloat.cpp PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and 2010-12-07 08:25:19 +00:00
APInt.cpp PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and 2010-12-07 08:25:19 +00:00
APSInt.cpp
Atomic.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
circular_raw_ostream.cpp
CMakeLists.txt Add ADT/IntEqClasses.h as a light-weight implementation of EquivalenceClasses.h. 2010-12-21 00:04:46 +00:00
CommandLine.cpp Support/PathV1: Deprecate getLast. 2010-12-18 00:19:10 +00:00
ConstantRange.cpp PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and 2010-12-07 08:25:19 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
DAGDeltaAlgorithm.cpp Use const_iterator where appropriate. 2010-06-08 17:21:57 +00:00
Debug.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
DeltaAlgorithm.cpp DeltaAlgorithm: Tweak split to split by first/second half instead of even/odd, since adjacent changes are more likely to be related. 2010-06-08 16:21:26 +00:00
Disassembler.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Dwarf.cpp Add the entire range of DW_OP_lit[0..31], DW_OP_reg[0..31], and 2010-06-17 01:23:24 +00:00
DynamicLibrary.cpp Don't leak the mutex when loading dynamic libraries. 2010-12-07 07:56:20 +00:00
Errno.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
ErrorHandling.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
FileUtilities.cpp MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm. 2010-12-16 03:29:14 +00:00
FoldingSet.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
FormattedStream.cpp Add missing standard headers. Patch by Joerg Sonnenberger! 2010-12-19 20:43:38 +00:00
GraphWriter.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Host.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
IncludeFile.cpp Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
IntEqClasses.cpp Use IntEqClasses to compute connected components of live intervals. 2010-12-21 00:48:17 +00:00
IntervalMap.cpp Add IntervalMap::iterator::set{Start,Stop,Value} methods that allow limited 2010-12-03 19:02:00 +00:00
IsInf.cpp
IsNAN.cpp
Makefile Merge System into Support. 2010-11-29 18:16:10 +00:00
ManagedStatic.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Memory.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
MemoryBuffer.cpp Add missing standard headers. Patch by Joerg Sonnenberger! 2010-12-19 20:43:38 +00:00
MemoryObject.cpp
Mutex.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Path.cpp Support/Path: Deprecate Path::hasMagicNumber and replace all uses with fs::has_magic. 2010-12-28 01:49:21 +00:00
PathV2.cpp Fix a signed/unsigned comparison warning. 2010-12-28 13:05:13 +00:00
PluginLoader.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
PrettyStackTrace.cpp Change all self assignments X=X to (void)X, so that we can turn on a 2010-12-23 00:58:24 +00:00
Process.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Program.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
README.txt.system Merge System into Support. 2010-11-29 18:16:10 +00:00
regcclass.h
regcname.h
regcomp.c
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
regexec.c lib/Support/regexec.c: Let Regex LLP64-aware. 2010-12-16 01:48:15 +00:00
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
SearchForAddressOfSpecialSymbol.cpp build: Go back to dropping __eprintf reference when building with Clang, see 2010-12-07 16:29:44 +00:00
Signals.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
SmallPtrSet.cpp Rather than giving SmallPtrSetImpl a member field SmallArray which is magically 2010-06-30 15:02:37 +00:00
SmallVector.cpp After some discussion with djg, teach SmallVector to grow from a zero 2010-09-02 21:55:03 +00:00
SourceMgr.cpp MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm. 2010-12-16 03:29:14 +00:00
Statistic.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
StringExtras.cpp
StringMap.cpp Change all self assignments X=X to (void)X, so that we can turn on a 2010-12-23 00:58:24 +00:00
StringPool.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
StringRef.cpp PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and 2010-12-07 08:25:19 +00:00
system_error.cpp Support/MemoryBuffer: Replace all uses of std::string *ErrMsg with error_code &ec. And fix clients. 2010-12-09 17:36:48 +00:00
SystemUtils.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
TargetRegistry.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Threading.cpp Now to chant the magical incantation that will exorcise the System library 2010-11-29 19:44:50 +00:00
ThreadLocal.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Timer.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
TimeValue.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
ToolOutputFile.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00
Triple.cpp Trailing whitespace and 80 column fixups. 2010-12-17 02:10:59 +00:00
Twine.cpp Support/ADT/Twine: Make toNullTerminatedStringRef not rely on UB :(. 2010-12-03 05:42:25 +00:00
Valgrind.cpp Merge System into Support. 2010-11-29 18:16:10 +00:00

Design Of lib/System
====================

The software in this directory is designed to completely shield LLVM from any
and all operating system specific functionality. It is not intended to be a
complete operating system wrapper (such as ACE), but only to provide the
functionality necessary to support LLVM.

The software located here, of necessity, has very specific and stringent design
rules. Violation of these rules means that cracks in the shield could form and
the primary goal of the library is defeated. By consistently using this library,
LLVM becomes more easily ported to new platforms since the only thing requiring
porting is this library.

Complete documentation for the library can be found in the file:
  llvm/docs/SystemLibrary.html
or at this URL:
  http://llvm.org/docs/SystemLibrary.html

While we recommend that you read the more detailed documentation, for the
impatient, here's a high level summary of the library's requirements.

 1. No system header files are to be exposed through the interface.
 2. Std C++ and Std C header files are okay to be exposed through the interface.
 3. No exposed system-specific functions.
 4. No exposed system-specific data.
 5. Data in lib/System classes must use only simple C++ intrinsic types.
 6. Errors are handled by returning "true" and setting an optional std::string
 7. Library must not throw any exceptions, period.
 8. Interface functions must not have throw() specifications.
 9. No duplicate function impementations are permitted within an operating
    system class.

To accomplish these requirements, the library has numerous design criteria that
must be satisfied. Here's a high level summary of the library's design criteria:

 1. No unused functionality (only what LLVM needs)
 2. High-Level Interfaces
 3. Use Opaque Classes
 4. Common Implementations
 5. Multiple Implementations
 6. Minimize Memory Allocation
 7. No Virtual Methods